registerform.java

一个j2me很简单的用户名密码注册的登陆框源代码

import java.io.IOException;
import java.util.Enumeration;

import javax.microedition.lcdui.Alert;
import javax.microedition.lcdui.AlertType;
import javax.microedition.lcdui.Command;
import javax.microedition.lcdui.CommandListener;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.Form;
import javax.microedition.lcdui.Image;
import javax.microedition.lcdui.TextField;

//注册界面
public class RegisterForm extends Form implements CommandListener
{
	private Command back;
	private Command ok;
	
	private TextField userName;
	private TextField password;
	private TextField passwordCon;
	
	private TextField realName;
	private TextField age;
	
	public RegisterForm(String title)
	{
		super(title);
		
		back = new Command("返回", Command.BACK, 1);
		ok = new Command("确定", Command.OK, 1);
		
		userName = new TextField("*用户名:", null, 20, TextField.ANY);
		password = new TextField("*密码:", null, 20, TextField.PASSWORD);
		passwordCon = new TextField("*确认密码:", null, 20, TextField.PASSWORD);
		
		realName = new TextField("真实姓名:", null, 20, TextField.ANY);
		age = new TextField("年龄:", "0", 20, TextField.NUMERIC);
		
		this.append(userName);
		this.append(password);
		this.append(passwordCon);
		this.append(realName);
		this.append(age);
		this.addCommand(back);
		this.addCommand(ok);
		this.setCommandListener(this);
	}

	public void commandAction(Command c, Displayable d)
	{
		if (c.equals(back))
		{
			MyLoginMIDlet.midlet.showMainList();
		}
		else if (c.equals(ok))
		{	
			String un = userName.getString();
			String pwd = password.getString();
			String pwdCon = passwordCon.getString();
			String rn = realName.getString();
			int age = Integer.parseInt(this.age.getString());

			if("".equals(un) || un==null)
			{
				Alert al = new Alert("错误", "用户名不能为空！", null, AlertType.ERROR);
				al.setTimeout(2000);
				MyLoginMIDlet.midlet.showAlert(al, this);
				return;
			}
			
			if (!pwd.equals(pwdCon))
			{
				Alert al = new Alert("错误", "确认密码错误！", null, AlertType.ERROR);
				al.setTimeout(2000);
				MyLoginMIDlet.midlet.showAlert(al, this);
				return;
			}
			
			Enumeration e = MyLoginMIDlet.userList.elements();
			while(e.hasMoreElements())
			{
				User user = (User)(e.nextElement());
				
				if (un.equals(user.getUserName()))
				{
					Alert al = new Alert("错误", "用户名已存在！", null, AlertType.ERROR);
					al.setTimeout(2000);
					MyLoginMIDlet.midlet.showAlert(al, this);
					return;
				}
			}
			
			User user = new User(un, pwd, rn, age);
			MyLoginMIDlet.userList.addElement(user);
			
			Alert al = new Alert("恭喜", "恭喜"+un+"注册成功！", null, AlertType.INFO);
			al.setTimeout(2000);
			MyLoginMIDlet.midlet.showAlert(al, MyLoginMIDlet.midlet.getMainList());
		}
	}

}